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Madaraoyama Lava Hayatsu, 1985

• Type locality: Mount Ishihara (= Arinoto), Togakushi, Nagano city, Nagano prefecture
• Volcanic rocks
• middle Pleistocene (0.55 Ma, K-Ar)

• Lithofacies: Pyroxene andesite lava, Pyroclastic rocks

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Mount Ishihara (= Arinoto), Togakushi, Nagano city, Nagano pref.; Cape Ryugu, Nojiri, Shinano city, Kamiminochi county, Nagano pref.

• Nagamori et al. (2003) Geology of the Togakushi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 109p. (in Japanese with English abstract 3p.)